JP2018081905A - High-speed flat cable having strong bent shape memory performance and production method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a high-speed flat cable having strong bent shape memory performance and a production method thereof.SOLUTION: A high-speed flat cable having strong bent shape memory performance, which includes a plurality of signal unit sets arranged with distance or in proximity on a substantially same flat plane, the signal unit set being a differential signal unit set, includes further an adhesive agent layer and two folding composite layers, the two folding composite layers surround the signal unit sets; the adhesive agent layer is located between two folding composite layers, the folding composite layers in the surrounding of the signal unit set are adhered with each other; the folding composite layer includes an inner insulation film layer, a folding metal foil layer and an outer insulation film layer that are sequentially adhered. The high-speed flat cable has strong bent shape memory performance, does not rebound after folding, can be bent a plurality of times, does not affect on high-speed transmission of signal when bent, difficulties encountered during an assembly process are effectively solved to result in improvement of production efficiency.SELECTED DRAWING: Figure 2

Description

  The present invention relates to the field of communication wires, and in particular, to a high-speed flat cable having a strong bending shape memory property, a high-speed flat cable having a bending shape memory property having a control signal, and a manufacturing method thereof.

  The high-speed flat cable generally includes a differential signal unit set, a ground wire, and a shield insulating film that covers the signal unit set and the ground wire. Currently, as the transmission speed and data storage volume of electronic devices continue to improve, and at the same time the layout space inside the devices becomes smaller, there is no more space between elements and devices, and high-speed flat cables affect data transmission. On the premise that it is not given, it is required to be able to bend arbitrarily and still not bounce.

  A conventional high-speed flat cable is relatively thick and is generally 1 mm or more. Due to the fact that there are defects such as universally poor bending shape memory and rebounding easily, the degree of difficulty during the installation process increases, and at the same time the data transmission performance after being bent many times The company was unable to meet the demands of electronic devices such as servers, workstations, exchanges, and base stations. In addition, the conventional high-speed flat cable also has drawbacks such as slow operation of the entire system and identification due to a poor identification function.

  In order to solve the above technical problem, an object of the present invention is to provide a high-speed flat cable which has a strong bending shape memory property, a thin thickness, and does not rebound.

  Another object of the present invention is to provide a high-speed flat cable having a control signal that can effectively improve system operation and identification function based on the bending shape memory function of the high-speed flat cable.

  In order to achieve the above-described object, the technical solution submitted in the present invention includes a plurality of signal unit sets arranged in substantially the same plane and arranged at close intervals or arranged close to each other. A high-speed flat cable having a strong bent shape memory which is a differential signal unit set, further comprising an adhesive layer and two folded composite layers, the two folded composite layers surrounding the signal unit set; Is located between the two folded composite layers, and the folded composite layers around the signal unit set are adhered to each other; the folded composite layers are sequentially bonded to the inner insulating film layer, the bent metal foil layer, and the outer insulating film. It is characterized by including layers.

  Furthermore, examples of the metal foil used for the metal foil layer include an aluminum foil, a copper foil, a silver foil, a gold foil, and an alloy foil thereof, but are not limited thereto, and an aluminum foil is preferable.

  Further, the adhesive between the inner insulating film layer, the bent metal foil layer and the outer insulating film layer is adhered with an adhesive, and as the adhesive, polyester, polyimide, polyamideimide, polytetrafluoroethylene, polypropylene, polyethylene, polyphenylene sulfide, polyethylene Examples include, but are not limited to, naphthalate, polycarbonate, silicone rubber, ethylene propylene diene rubber, polyurethane, methyl acrylate, organic silicone, natural rubber, epoxy resin, and synthetic rubber adhesive.

  Further, the folded composite layer extends one section laterally outside the outermost signal unit set and adheres to each other; both the width of the outer insulating film layer and the width of the inner insulating film layer are bent metal Slightly larger than the foil layer, blocking the contact between the folded aluminum foil and the outside; or applying an insulating paint or insulating adhesive to both sides of the folded composite layer to block the contact between the folded metal foil layer and the outside .

  Furthermore, the differential signal unit set includes a first core wire, a first ground wire, and a first insulating shielding layer covering the first core wire and the first ground wire, the first core wire having two wires, Each first core wire includes a first conductor and a first longitudinal insulator covering the first conductor; or, the first core wire is one, two first conductors, and two first conductors. Including a first longitudinal insulator covering the conductor and still separating the two first conductors; preferably, the first insulating shield layer is an aluminum foil mylar layer.

  Further, the first ground wire is one and is arranged on one side of the second core wire; or the first ground wire is two and is distributed symmetrically on the upper and lower sides or the left and right sides of the first core wire. .

  Further, for the outer insulating film layer and the inner insulating film layer, an insulating material capable of enhancing the bending shape memory property by a machine, for example, PET, PFA, FEP or the like is used.

The present invention further includes a method for producing the high-speed flat cable,
Step 1 for extruding the first core wire, covering the outer periphery of the first core wire and the first ground wire with a first insulating shielding layer to form a differential signal unit set;
The differential signal unit set manufactured in Step 1 is arranged in parallel, an adhesive layer is applied on the inner insulating film layer, the side having the adhesive layer is close to the signal unit set, and the inner insulating film layer is arranged in parallel. Rolling on a set of signal units,
Step 3 of bonding the folded metal foil layer with an adhesive and rolling on the inner insulating film layer;
Step 4 of bonding the outer insulating film layer with an adhesive and rolling on the folded metal foil layer;
It is characterized by including.

  In order to improve the system operation and the identification function, the present invention further provides a high-speed flat cable having a control signal and a strong bending shape memory, and based on the high-speed cable, the signal unit set includes at least one control signal unit set. In addition, the differential signal unit set and the control signal unit set are arbitrarily arranged.

  Further, the control signal unit set includes a second core wire, the second core wire includes a second conductor and a second longitudinal insulator covering the second conductor; Two insulating shielding layers are coated; preferably, the second insulating shielding layer is an aluminum foil mylar layer.

  Further, at least one second ground wire is further covered in the second insulating shielding layer.

  Further, the control signal unit set includes at least five control signal unit sets, and the control signal unit sets are arranged adjacent to each other every five, and at most five are arranged adjacent to each other.

The present invention further includes a method of manufacturing a high-speed flat cable having the control signal,
Step 1 for extruding the first core wire, covering the outer periphery of the first core wire and the first ground wire with a first insulating shielding layer to form a differential signal unit set;
Step 2 of extruding the second core wire, covering the outer periphery of the second core wire and the second ground wire with a second insulating shielding layer to form a control signal unit set;
The differential signal unit set and the control signal unit set manufactured in Step 1 and Step 2 are arranged in parallel to form a signal unit set, which is placed on the inner insulating film layer on the upper and lower sides of the signal unit set, and on the inner insulating film layer. Rolling the adhesive layer onto the signal unit set on which the side having the adhesive layer is close to the signal unit set and the inner insulating film layer is arranged in parallel;
Step 4 of bonding the folded metal foil layer with an adhesive and rolling on the inner insulating film layer;
Step 5 of bonding the outer insulating film layer with an adhesive and rolling on the folded metal foil layer;
It is characterized by including.

As compared with the prior art, as a beneficial effect of the high-speed flat cable having a strong bending shape memory function according to the present invention and the manufacturing method thereof,
1) By providing a folding composite layer, the flat cable bending workability is effectively improved, and the high-speed flat cable can be bent at various angles such as 45 degrees, 90 degrees, 180 degrees, or a plurality of times. It can be folded, but at the same time it does not affect the high-speed transmission of signals, has a strong bending shape memory, and does not bounce after being folded, effectively solving the difficulties encountered in the assembly process To increase production efficiency;
2) Long life, after testing, the electrical performance of the signal is not affected even if it is bent at least 500 times;
3) As a preferred form, by providing the control signal unit set in the flat cable, the system operation and the identification function are effectively improved, and the transmission speed of the control signal can reach 24 Gbps or higher. .

Schematic diagram showing a high-speed flat cable according to the present invention. Enlarged view of part A in FIG. Sectional drawing which shows the structure which does not leave the space | interval of the high-speed flat cable which concerns on this invention Sectional view of the single signal unit set of FIG. Sectional drawing which shows the structure which leaves the space | interval of the high-speed flat cable which concerns on this invention Resistance measurement diagram of high-speed flat cable according to the present invention Attenuation measurement diagram of high-speed flat cable according to the present invention Near-end crosstalk diagram of high-speed flat cable according to the present invention Far-end crosstalk test diagram of high-speed flat cable according to the present invention Schematic diagram showing a differential signal unit set according to the first embodiment of the present invention. Schematic diagram showing a differential signal unit set according to a second embodiment of the present invention. Schematic diagram showing a differential signal unit set according to a third embodiment of the present invention. Schematic diagram showing a differential signal unit set according to a fourth embodiment of the present invention. Schematic diagram showing a differential signal unit set according to a fifth embodiment of the present invention. Schematic diagram showing a differential signal unit set according to a sixth embodiment of the present invention. Schematic diagram showing a differential signal unit set according to a seventh embodiment of the present invention. Schematic diagram when the high-speed flat cable according to the present invention is bent at 45 degrees. Schematic diagram when the high-speed flat cable according to the present invention is bent several times Schematic diagram showing a high-speed flat cable having a control signal according to the present invention. Schematic diagram showing a high-speed flat cable having a control signal according to the present invention. Schematic diagram showing a high-speed flat cable having a control signal according to the present invention. Schematic diagram showing a control signal unit set according to the first embodiment of the present invention. Schematic diagram showing a control signal unit set according to a second embodiment of the present invention. Schematic diagram showing a control signal unit set according to a third embodiment of the present invention.

  The present invention will be further described below with reference to the accompanying drawings and examples.

  As the transmission speed and data storage amount of electronic devices are continually improved, and the space inside the devices becomes smaller and smaller, there is no gap between the elements and devices. The high-speed flat cable according to the present invention Bending shape memory performance can be improved effectively, it does not bounce after being bent, and it does not affect the high-speed transmission of signals at the same time as it is bent, effectively solving the difficulties encountered in the assembly process This improves manufacturing efficiency.

  Specifically, as shown in FIGS. 1 and 2, the high-speed flat cable according to the present invention includes a plurality of differential signal unit sets 10 arranged almost at the same plane and arranged at intervals. Further comprising two folded composite layers 20 and an adhesive layer (not shown), the two folded composite layers 20 surround the differential signal unit set 10; the adhesive layer is between the two folded composite layers 20. Further, the folded composite layer 20 around the signal unit set 10 is bonded to each other, and the two folded composite layers 20 at the interval portions of the differential signal unit set 10 are bonded with an adhesive layer.

  Further, as shown in FIGS. 1 and 2, the folded composite layer 20 includes an inner insulating film layer 21, a bent metal foil layer 22, and an outer insulating film layer 23 that are sequentially bonded; the outer insulating film layer 23 and the inner insulating layer 23. The membrane layer 21 is used for enhancing the bending shape memory effect of the high-speed flat cable using PET, PFA, FEP or other insulating materials capable of enhancing the bending shape memory property by machine. As the bent metal foil layer 22, a metal foil having good shape memory properties such as an aluminum foil, a copper foil, a silver foil, a gold foil, and an alloy foil thereof can be used. After the verification, the aluminum foil is used as a bent metal foil layer. The bending shape memory effect was the highest.

  In the present invention, the folded composite layer 20 is applied to the upper and lower sides of the signal unit set so that the folded composite layer 20 fully utilizes the shape memory function of the metal foil layer, thereby realizing the bent shape memory effect of the flat cable. Even after bending the high-speed flat cable, it does not bounce; at the same time, an outer insulating film layer and an inner insulating film layer are provided above and below the metal foil layer so that the bent metal foil layer does not have electrical performance, and the bending shape memory performance by machine In addition, the inner insulating film layer 21, the outer insulating film layer 23 and the bent metal foil layer 22 all use relatively thin dimensions, and the intermediate adhesive also adopts an extremely thin dimension. When the thickness is made less than 1 mm and the inner insulating film layer 21 and the outer insulating film layer 23 are further provided, the metal foil layer is effectively prevented from cracking, the toughness of the folded composite layer is enhanced, and the folding is performed. The entire case layer is easier further bending, at the same time it is possible to prolong the service life of the flat cable.

  After the verification, the number of bending of the high-speed flat cable according to the present invention can reach 500 times or more. The high-speed flat cable of the present invention can be bent at various angles such as 45 degrees (FIG. 17), 90 degrees, 180 degrees, etc., or bend multiple times (FIG. 18). Does not affect. The test results after bending the high-speed flat cable 500 times are as shown in FIGS. 6-8, FIG. 6 is a resistance measurement diagram, FIG. 7 is an attenuation measurement diagram, and FIG. 8 is a near-end crosstalk diagram; Is a far-end crosstalk test diagram. After undergoing 500 bending in the test results, the resistance change amount of the high-speed flat cable according to the present invention is within 1 ohm and the attenuation change amount is within 0.8 dB. It shows that stability can meet the requirement of 24 Gbps transmission rate.

  The inner insulating film layer, the bent metal foil layer and the outer insulating film layer are bonded with an adhesive, and as an adhesive, polyester, polyimide, polyamideimide, polytetrafluoroethylene, polypropylene, polyethylene, polyphenylene sulfide, polyethylene naphthalate And adhesives such as, but not limited to, polycarbonate, silicone rubber, ethylene propylene diene rubber, polyurethane, methyl acrylate, organic silicone, natural rubber, epoxy resin and synthetic rubber adhesive.

  In order to prevent the aluminum foil on the surface and both sides from coming into contact with the equipment, a section is placed laterally outside the outermost signal unit set of the folded composite layer as shown in FIGS. It plays an insulating role by stretching in the direction and adhering to each other. The width of the outer insulating film layer and the width of the inner insulating film layer are both slightly larger than the bent metal foil layer, blocking the contact between the bent aluminum foil and the outside; By applying an insulating adhesive, contact between the bent metal foil layer and the outside can also be blocked.

  The difference between the embodiment shown in FIG. 5 and the embodiment shown in FIG. 3 is that the differential signal unit sets 10 are arranged close to each other, and the two folded composite layers 20 surround the plurality of differential signal unit sets. The layer is located between the two folded composite layers 20 and the folded composite layers 20 around the signal unit set are glued together.

  Further, as shown in FIGS. 10 to 16, the differential signal unit set 10 includes a first core wire 11, a first ground wire 12, and a first insulation shield that covers the first core wire 11 and the first ground wire 12. And the first core wire includes a first conductor and a longitudinal insulator covering the first conductor, and is shielded and insulated by the first insulating shielding layer 13. Preferably, the first insulating shielding layer 13 is an aluminum foil mylar layer; or the first core wire is one and covers the two first conductors and the two first conductors. In addition, it includes a longitudinal insulator in which the two first conductors are separated; preferably, the first insulation shielding layer is an aluminum foil mylar layer. The ground wire 12 is placed in the vicinity of the core wire 11. When the number of the ground wire 12 is one, the ground wire 12 is disposed on one side of the core wire 11. For example, the left side, the right side, the upper side, the lower side, or two of the single core wire 11. When the number of the ground wires 12 is two, the core wires 11 are symmetrically distributed on the upper and lower sides or the left and right sides of the core wires 11; These seven types of differential signal unit sets can be used in the embodiment shown in FIGS. 3 and 5.

  In order to improve the system operation and identification function of the high-speed flat cable, the present invention further provides a technical solution of a high-speed flat cable having a control signal and a strong bending shape memory, as shown in FIGS. In light of the high-speed cable, the signal unit set further includes at least one control signal unit set 30, and the differential signal unit set 10 and the control signal unit set 30 are arbitrarily arranged; The quantity of the differential signal unit set 10 can be provided according to demand. The differential signal unit set 10 realizes high-speed signal transmission, and the control signal unit set 30 transmits low-frequency signals. System operation and identification function, for example, connected to LED lights through control signals If LED lamp is lit, indicating that the signal is connected. Preferably, the control signal unit set 30 has resistance control and is used to transmit a control signal or one-sided resistance, and when such an installation is adopted, the transmission speed of the control signal can reach 24 Gbps or higher. Can do.

  FIG. 20 and FIG. 21 of the present embodiment show one differential signal unit set and five control signal unit sets, and the control signal unit set includes at least five control signal unit sets. However, every five control signal unit sets are arranged next to each other and at most five are arranged next to each other, and each of these five control signal unit sets has a single resistance. Can be used to transmit a high-frequency signal as a differential pair, can also transmit a low-frequency signal alone, and each core wire has a single ground wire and is connected to the ground. Thus, interference can be prevented.

  The difference between the embodiment shown in FIG. 21 and the embodiment shown in FIG. 20 is that signal unit sets are arranged at intervals, two folded composite layers 20 surround the plurality of signal unit sets, and two adhesive layers are provided. It is located between the two folded composite layers 20, and the folded composite layers 20 around the signal unit set are adhered to each other, and the two folded composite layers 20 at the interval portions of the signal unit set are adhered with an adhesive layer.

  In Example 1 of the control signal unit set 3 shown in FIG. 22, the control signal unit set 30 includes the second core wire, and the second core wire covers the second conductor 31 and the second conductor 31 in the second longitudinal direction. And an insulator 32.

  In Example 2 of the control signal unit set 3 shown in FIG. 23, the control signal unit set 30 includes a second core wire and a second insulating shielding layer 33, and the second core wire is a second conductor 31 and a second conductor. Second insulating shield layer 33 covering the second core wire; second insulating shield layer 33 is preferably an aluminum foil mylar layer.

  In Example 3 of the control signal unit set 3 shown in FIG. 24, the control signal unit set 3 includes a second core wire, a second ground wire 34, and a second insulating shielding layer 33, and the second core wire is a second conductor. 31 and a second longitudinal insulator 32 covering the second conductor 31, the second ground wire 34 is provided on one side of the second core wire, and is parallel to the second core wire, so that the second An insulating shielding layer 33 covers the second core wire and the second ground wire 34; the second insulating shielding layer 33 is preferably an aluminum foil mylar layer.

  The control signal unit set 3 shown in FIGS. 12 to 24 can be used in the embodiments shown in FIGS.

The present invention further includes a method of manufacturing a high-speed flat cable having a bending shape memory property having the control signal,
Step 1 for extruding the first core wire, covering the outer periphery of the first core wire and the first ground wire with a first insulating shielding layer to form a differential signal unit set;
Step 2 of extruding the second core wire, winding and covering the outer periphery of the second core wire with a second insulating shielding layer, and constituting a control signal unit set;
The differential signal unit set and the control signal unit set manufactured in Step 1 and Step 2 are arranged in parallel to form a signal unit set, which is placed on the inner insulating film layer on the upper and lower sides of the signal unit set, and on the inner insulating film layer. Rolling the adhesive layer onto the signal unit set on which the side having the adhesive layer is close to the signal unit set and the inner insulating film layer is arranged in parallel;
Step 4 of bonding the folded metal foil layer with an adhesive and rolling on the inner insulating film layer;
Step 5 of bonding the outer insulating film layer with an adhesive and rolling on the folded metal foil layer;
It is characterized by including.

  Although preferred embodiments of the present invention have been disclosed as described above, these are not intended to limit the present invention in any way, and anyone who is familiar with the technology can use the disclosed technical contents as equivalent embodiments. Can be changed or modified. Various modifications, equivalent replacements and modifications made to the above embodiments based on the technology of the present invention without departing from the content of the technical solution of the present invention are not limited to the technical solutions of the present invention. Belongs to the scope of protection.

  According to the present invention, the production efficiency is improved, the product life is extended, the system operation and the identification function are improved, and the speed of the control signal is increased, which is industrially useful.

Claims (16)

A high-speed flat cable having a strong bent shape memory property, including a plurality of signal unit sets arranged in a substantially same plane and arranged at close intervals or in close proximity, wherein the signal unit set is a differential signal unit set. ,
And further comprising an adhesive layer and two folded composite layers, the two folded composite layers surrounding the signal unit set; the adhesive layer being located between the two folded composite layers and surrounding the signal unit set The bent composite layer adheres to each other; the bent composite layer includes an inner insulating film layer, a bent metal foil layer, and an outer insulating film layer which are sequentially bonded. Flat cable. The high-speed flat cable with strong bending shape memory property according to claim 1, wherein the metal foil used for the metal foil layer is an aluminum foil, a copper foil, a silver foil, or a gold foil. The high-speed flat cable with strong bending shape memory property according to claim 1, wherein the metal foil used for the metal foil layer is an aluminum foil. The high-speed flat cable with strong bending shape memory property according to claim 1, wherein the folded composite layer extends one section laterally outside the outermost signal unit set and adheres to each other. Both the width of the outer insulating film layer and the width of the inner insulating film layer are slightly larger than the bent metal foil layer, and the contact between the bent aluminum foil and the outside is interrupted; The high-speed flat cable with strong bending shape memory property according to claim 1, wherein an insulating paint or an insulating adhesive is applied to block contact between the bent metal foil layer and the outside. The differential signal unit set includes a first core wire, a first ground wire, and a first insulating shielding layer covering the first core wire and the first ground wire, and the first core wire has two wires, Each of the first core wires includes a first conductor and a first longitudinal insulator covering the first conductor; or, the first core wire is one, the two first conductors, and the two The high-speed flat cable with strong bending shape memory property according to claim 1, further comprising: a first longitudinal insulator that covers the first conductor and separates the two first conductors. The high-speed flat cable with strong bending shape memory property according to claim 6, wherein the first insulating shielding layer is an aluminum foil mylar layer. The first ground wire is one and is disposed on one side of the second core wire; or the two first ground wires are symmetrically distributed on the upper and lower sides or the left and right sides of the first core wire. The high-speed flat cable with strong bending shape memory property according to claim 3. The high-speed flat cable with strong bending shape memory property according to claim 1, wherein the outer insulating film layer and the inner insulating film layer are insulating materials capable of enhancing bending shape memory property by a machine. A method for producing a high-speed flat cable having a strong bending shape memory property according to any one of claims 1 to 9,
Step 1 of extruding a first core wire, winding and covering a first insulating shielding layer around the outer periphery of the first core wire and the first ground wire, and constituting a differential signal unit set;
The differential signal unit sets manufactured in step 1 are arranged in parallel, an adhesive layer is applied on the inner insulating film layer, the side having the adhesive layer is close to the signal unit set, and the inner insulating film layer is parallel Rolling on the signal unit set arranged in
Bonding the folded metal foil layer with an adhesive and rolling it on the inner insulating film layer; and
And a step 4 of bonding the outer insulating film layer with an adhesive and rolling the outer insulating film layer onto the bent metal foil layer. A high-speed flat cable having a strong bending shape memory property having a control signal,
The high-speed flat cable with strong bending shape memory property according to any one of claims 1 to 9, wherein the signal unit set further includes at least one control signal unit set, and the differential signal unit set and the control signal unit set include: A high-speed flat cable with a strong bending shape memory having a control signal characterized by being arranged arbitrarily. The control signal unit set includes a second core wire, and the second core wire includes a second conductor and a second longitudinal insulator covering the second conductor; 2. A high-speed flat cable having a strong bent shape memory property and having a control signal according to claim 11. The high-speed flat cable having strong bending shape memory property having a control signal according to claim 12, wherein the second insulating shielding layer is an aluminum foil mylar layer. The high-speed flat cable with strong bending shape memory property having the control signal according to claim 12, further covering at least one second ground wire in the second insulating shielding layer. 12. The control signal unit set includes at least five control signal unit sets, and the control signal unit sets are arranged adjacent to each other every five, and at most five are arranged adjacent to each other. A high-speed flat cable with strong bending shape memory having the control signal described in 1. A method for manufacturing a high-speed flat cable having a strong bending shape memory property having a control signal,
Step 1 of extruding a first core wire, winding and covering a first insulating shielding layer around the outer periphery of the first core wire and the first ground wire, and constituting a differential signal unit set;
Step 2 of extruding a second core wire, winding and covering a second insulating shielding layer around the outer periphery of the second core wire and the second ground wire, and constituting a control signal unit set;
The differential signal unit set and the control signal unit set manufactured in Step 1 and Step 2 are arranged in parallel to constitute a signal unit set, and are placed on inner insulating film layers on both upper and lower sides of the signal unit set. Step 3 of applying an adhesive layer on the insulating film layer, rolling the inner insulating film layer on the signal unit set arranged in parallel, the side having the adhesive layer being close to the signal unit set, and
Step 4 of bonding the folded metal foil layer with an adhesive and rolling on the inner insulating film layer;
A method of manufacturing a high-speed flat cable having a strong bent shape memory and having a control signal, comprising: adhering an outer insulating film layer with an adhesive and rolling on the bent metal foil layer.

Images